Air Intake Shutoff Valves

Air intake shutoff valves (often referred to as AISV or ASOV) and systems provide emergency overspeed shutdown protection for diesel engines and are the most effective way of preventing a runaway situation. The valves completely block the engine air intake system, cutting off an uncontrolled external fuel source and the air required to keep the engine running.

The speed sensors are designed to measure diesel engine RPM for use in the automatic electric or automatic electric-to-pneumatic overspeed protection systems. The sensors are typically mounted to detect the diesel engine flywheel RPM.

Speed switches are used to monitor engine rpm in automatic diesel engine overspeed protection systems. In the event of an engine overspeed condition, the speed switch will immediately take action to shut down the diesel engine. We have a several types of switches for use in a wide range of automatic shutdown systems including electric, hazardous area electric, and hydro-mechanical switches.